/*
Date.prototype.isLeapYear 判断闰年
Date.prototype.Format 日期格式化
Date.prototype.DateAdd 日期计算
Date.prototype.DateDiff 比较日期差
Date.prototype.toString 日期转字符串
Date.prototype.toArray 日期分割为数组
Date.prototype.DatePart 取日期的部分信息
Date.prototype.MaxDayOfDate 取日期所在月的最大天数
StringToDate 字符串转日期型
IsValidDate 验证日期有效性
CheckDateTime 完整日期时间检查
daysBetween 日期天数差
 */
Array.prototype.lastIndexOf = function(item) {
	var len = this.length;
	for (var i = len; i >= 0; i--) {
		if (this[i] === item) {
			return len - i;
		}
	}
	return -1;
}

// ---------------------------------------------------
// 判断闰年
// ---------------------------------------------------
Date.prototype.isLeapYear = function() {
	return (0 == this.getYear() % 4 && ((this.getYear() % 100 != 0) || (this
			.getYear() % 400 == 0)));
}

// ---------------------------------------------------
// 日期格式化
// 格式 YYYY/yyyy/YY/yy 表示年份
// MM/M 月份
// W/w 星期
// dd/DD/d/D 日期
// hh/HH/h/H 时间
// mm/m 分钟
// ss/SS/s/S 秒
// ---------------------------------------------------
Date.prototype.Format = function(formatStr) {
	var str = formatStr;
	var Week = [ '日', '一', '二', '三', '四', '五', '六' ];

	str = str.replace(/yyyy|YYYY/, this.getFullYear());
	str = str.replace(/yy|YY/,
			(this.getYear() % 100) > 9 ? (this.getYear() % 100).toString()
					: '0' + (this.getYear() % 100));

	str = str.replace(/MM/, this.getMonth() > 9 ? this.getMonth().toString()
			: '0' + this.getMonth());
	str = str.replace(/M/g, this.getMonth());

	str = str.replace(/w|W/g, Week[this.getDay()]);

	str = str.replace(/dd|DD/, this.getDate() > 9 ? this.getDate().toString()
			: '0' + this.getDate());
	str = str.replace(/d|D/g, this.getDate());

	str = str.replace(/hh|HH/, this.getHours() > 9 ? this.getHours().toString()
			: '0' + this.getHours());
	str = str.replace(/h|H/g, this.getHours());
	str = str.replace(/mm/, this.getMinutes() > 9 ? this.getMinutes()
			.toString() : '0' + this.getMinutes());
	str = str.replace(/m/g, this.getMinutes());

	str = str.replace(/ss|SS/, this.getSeconds() > 9 ? this.getSeconds()
			.toString() : '0' + this.getSeconds());
	str = str.replace(/s|S/g, this.getSeconds());

	return str;
}

// +---------------------------------------------------
// | 求两个时间的天数差 日期格式为 YYYY-MM-dd
// +---------------------------------------------------
function daysBetween(DateOne, DateTwo) {
	var OneMonth = DateOne.substring(5, DateOne.lastIndexOf('-'));
	var OneDay = DateOne
			.substring(DateOne.length, DateOne.lastIndexOf('-') + 1);
	var OneYear = DateOne.substring(0, DateOne.indexOf('-'));

	var TwoMonth = DateTwo.substring(5, DateTwo.lastIndexOf('-'));
	var TwoDay = DateTwo
			.substring(DateTwo.length, DateTwo.lastIndexOf('-') + 1);
	var TwoYear = DateTwo.substring(0, DateTwo.indexOf('-'));

	var cha = ((Date.parse(OneMonth + '/' + OneDay + '/' + OneYear) - Date
			.parse(TwoMonth + '/' + TwoDay + '/' + TwoYear)) / 86400000);
	return Math.abs(cha) + 1;
}

// +---------------------------------------------------
// | 日期计算
// +---------------------------------------------------
Date.prototype.DateAdd = function(strInterval, Number) {
	var dtTmp = this;
	switch (strInterval) {
	case 's':
		return new Date(Date.parse(dtTmp) + (1000 * Number));
	case 'n':
		return new Date(Date.parse(dtTmp) + (60000 * Number));
	case 'h':
		return new Date(Date.parse(dtTmp) + (3600000 * Number));
	case 'd':
		return new Date(Date.parse(dtTmp) + (86400000 * Number));
	case 'w':
		return new Date(Date.parse(dtTmp) + ((86400000 * 7) * Number));
	case 'q':
		return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number * 3,
				dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp
						.getSeconds());
	case 'm':
		return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number, dtTmp
				.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp
				.getSeconds());
	case 'y':
		return new Date((dtTmp.getFullYear() + Number), dtTmp.getMonth(), dtTmp
				.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp
				.getSeconds());
	}
}

// +---------------------------------------------------
// | 比较日期差 dtEnd 格式为日期型或者 有效日期格式字符串
// +---------------------------------------------------
Date.prototype.DateDiff = function(strInterval, dtEnd) {
	var dtStart = this;
	if (typeof dtEnd == 'string')// 如果是字符串转换为日期型
	{
		dtEnd = StringToDate(dtEnd);
	}
	switch (strInterval) {
	case 's':
		return parseInt((dtEnd - dtStart) / 1000);
	case 'n':
		return parseInt((dtEnd - dtStart) / 60000);
	case 'h':
		return parseInt((dtEnd - dtStart) / 3600000);
	case 'd':
		return parseInt((dtEnd - dtStart) / 86400000);
	case 'w':
		return parseInt((dtEnd - dtStart) / (86400000 * 7));
	case 'm':
		return (dtEnd.getMonth() + 1)
				+ ((dtEnd.getFullYear() - dtStart.getFullYear()) * 12)
				- (dtStart.getMonth() + 1);
	case 'y':
		return dtEnd.getFullYear() - dtStart.getFullYear();
	}
}

// +---------------------------------------------------
// | 字符串转成日期类型
// | 格式 MM/dd/YYYY MM-dd-YYYY YYYY/MM/dd YYYY-MM-dd
// +---------------------------------------------------
function StringToDate(DateStr) {

	var converted = Date.parse(DateStr);
	var myDate = new Date(converted);
	if (isNaN(myDate)) {
		// var delimCahar = DateStr.indexOf('/')!=-1?'/':'-';
		var arys = DateStr.split('-');
		myDate = new Date(arys[0], --arys[1], arys[2]);
	}
	return myDate;
}

function DateAdd(date, strInterval, Number) {
	var dtTmp = date;
	switch (strInterval) {
	case 's':
		return new Date(Date.parse(dtTmp) + (1000 * Number));
	case 'n':
		return new Date(Date.parse(dtTmp) + (60000 * Number));
	case 'h':
		return new Date(Date.parse(dtTmp) + (3600000 * Number));
	case 'd':
		return new Date(Date.parse(dtTmp) + (86400000 * Number));
	case 'w':
		return new Date(Date.parse(dtTmp) + ((86400000 * 7) * Number));
	case 'q':
		return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number * 3,
				dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp
						.getSeconds());
	case 'm':
		return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number, dtTmp
				.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp
				.getSeconds());
	case 'y':
		return new Date((dtTmp.getFullYear() + Number), dtTmp.getMonth(), dtTmp
				.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp
				.getSeconds());
	}
}

// +---------------------------------------------------
// | 比较日期差 dtEnd 格式为日期型或者 有效日期格式字符串
// +---------------------------------------------------
function DateDiff(strInterval, dtStart, dtEnd) {
	if (typeof dtEnd == 'string')// 如果是字符串转换为日期型
	{
		dtEnd = StringToDate(dtEnd);
	}
	switch (strInterval) {
	case 's':
		return parseInt((dtEnd - dtStart) / 1000);
	case 'n':
		return parseInt((dtEnd - dtStart) / 60000);
	case 'h':
		return parseInt((dtEnd - dtStart) / 3600000);
	case 'd':
		return parseInt((dtEnd - dtStart) / 86400000);
	case 'w':
		return parseInt((dtEnd - dtStart) / (86400000 * 7));
	case 'm':
		return (dtEnd.getMonth() + 1)
				+ ((dtEnd.getFullYear() - dtStart.getFullYear()) * 12)
				- (dtStart.getMonth() + 1);
	case 'y':
		return dtEnd.getFullYear() - dtStart.getFullYear();
	}
}

// +---------------------------------------------------
// | 日期输出字符串，重载了系统的toString方法
// +---------------------------------------------------
Date.prototype.toString = function(showWeek) {
	var myDate = this;
	var str = myDate.toLocaleDateString();
	if (showWeek) {
		var Week = [ '日', '一', '二', '三', '四', '五', '六' ];
		str += ' 星期' + Week[myDate.getDay()];
	}
	return str;
}

// +---------------------------------------------------
// | 日期合法性验证
// | 格式为：YYYY-MM-DD或YYYY/MM/DD
// +---------------------------------------------------
function IsValidDate(DateStr) {
	var sDate = DateStr.replace(/(^\s+|\s+$)/g, ''); // 去两边空格;
	if (sDate == '')
		return true;
	// 如果格式满足YYYY-(/)MM-(/)DD或YYYY-(/)M-(/)DD或YYYY-(/)M-(/)D或YYYY-(/)MM-(/)D就替换为''
	// 数据库中，合法日期可以是:YYYY-MM/DD(2003-3/21),数据库会自动转换为YYYY-MM-DD格式
	var s = sDate.replace(
			/[\d]{ 4,4 }[\-/]{ 1 }[\d]{ 1,2 }[\-/]{ 1 }[\d]{ 1,2 }/g, '');
	if (s == '') // 说明格式满足YYYY-MM-DD或YYYY-M-DD或YYYY-M-D或YYYY-MM-D
	{
		var t = new Date(sDate.replace(/\-/g, '/'));
		var ar = sDate.split(/[-/:]/);
		if (ar[0] != t.getYear() || ar[1] != t.getMonth() + 1
				|| ar[2] != t.getDate()) {
			// alert('错误的日期格式！格式为：YYYY-MM-DD或YYYY/MM/DD。注意闰年。');
			return false;
		}
	} else {
		// alert('错误的日期格式！格式为：YYYY-MM-DD或YYYY/MM/DD。注意闰年。');
		return false;
	}
	return true;
}

// +---------------------------------------------------
// | 日期时间检查
// | 格式为：YYYY-MM-DD HH:MM:SS
// +---------------------------------------------------
function CheckDateTime(str) {
	var reg = /^(\d+)-(\d{ 1,2 })-(\d{ 1,2 }) (\d{ 1,2 }):(\d{ 1,2 }):(\d{ 1,2 })$/;
	var r = str.match(reg);
	if (r == null)
		return false;
	r[2] = r[2] - 1;
	var d = new Date(r[1], r[2], r[3], r[4], r[5], r[6]);
	if (d.getFullYear() != r[1])
		return false;
	if (d.getMonth() != r[2])
		return false;
	if (d.getDate() != r[3])
		return false;
	if (d.getHours() != r[4])
		return false;
	if (d.getMinutes() != r[5])
		return false;
	if (d.getSeconds() != r[6])
		return false;
	return true;
}

// +---------------------------------------------------
// | 把日期分割成数组
// +---------------------------------------------------
Date.prototype.toArray = function() {
	var myDate = this;
	var myArray = Array();
	myArray[0] = myDate.getFullYear();
	myArray[1] = myDate.getMonth();
	myArray[2] = myDate.getDate();
	myArray[3] = myDate.getHours();
	myArray[4] = myDate.getMinutes();
	myArray[5] = myDate.getSeconds();
	return myArray;
}

// +---------------------------------------------------
// | 取得日期数据信息
// | 参数 interval 表示数据类型
// | y 年 m月 d日 w星期 ww周 h时 n分 s秒
// +---------------------------------------------------
Date.prototype.DatePart = function(interval) {
	var myDate = this;
	var partStr = '';
	var Week = [ '日', '一', '二', '三', '四', '五', '六' ];
	switch (interval) {
	case 'y':
		partStr = myDate.getFullYear();
		break;
	case 'm':
		partStr = myDate.getMonth() + 1;
		break;
	case 'd':
		partStr = myDate.getDate();
		break;
	case 'w':
		partStr = Week[myDate.getDay()];
		break;
	case 'ww':
		partStr = myDate.WeekNumOfYear();
		break;
	case 'h':
		partStr = myDate.getHours();
		break;
	case 'n':
		partStr = myDate.getMinutes();
		break;
	case 's':
		partStr = myDate.getSeconds();
		break;
	}
	return partStr;
}

// +---------------------------------------------------
// | 取得当前日期所在月的最大天数
// +---------------------------------------------------
Date.prototype.MaxDayOfDate = function() {
	var myDate = this;
	var ary = myDate.toArray();
	var date1 = (new Date(ary[0], ary[1] + 1, 1));
	var date2 = date1.dateAdd(1, 'm', 1);
	var result = dateDiff(date1.Format('yyyy-MM-dd'), date2
			.Format('yyyy-MM-dd'));
	return result;
}

// +---------------------------------------------------
// | 字符串转成日期类型
// | 格式 MM/dd/YYYY MM-dd-YYYY YYYY/MM/dd YYYY-MM-dd
// +---------------------------------------------------
function StringToDate(DateStr) {

	var converted = Date.parse(DateStr);
	var myDate = new Date(converted);
	if (isNaN(myDate)) {
		// var delimCahar = DateStr.indexOf('/')!=-1?'/':'-';
		var arys = DateStr.split('-');
		myDate = new Date(arys[0], --arys[1], arys[2]);
	}
	return myDate;
}